we have x + 4y = 3 and 3x + y = 15 as the lines of regression of y on x and x on y respectively.
therfore, for y = 3 the required line is x on y
so put y= 3 in 3x + y = 15
we get, x = 4
| True/False | MCQ |
Easy | 300 | 500
|
Difficult | 200 | 400 |
Total = 1400, therefore n(S) = 1400 Let A = event of getting easy question B = event of getting multiple choice question.
Let other two numbers be x and y
Mean (x) = 4.4 =
this gives ......(1)
Also, ........(2)
Therefore from (1) and (2)
x = 9 and y = 4
comparinf the given equation with ax + by + c= 0
a = -4, b =1 and c= -3
so ab < 0
hence,
so a perfect positive correlation.